Chair-back adjustment.



J; SALOMON. CHAIR BACK ADJUSTMENT. APPLIQATION TILED AUG. 14, 1905.

Patented Oct. 20,1908.

JOSEPH SALOMON, OF CHICAGO, ILLINOIS. I

CHAIR-B ACK ADJUSTMENT.

Specification of Letters Patent.

Patented Oct. 20, 1908.

Application filed August 14, 1905. Serial No. 274,028.

To all whom it may concern:

' Be it known that I, JosEPH SALOMON, a citizen of the United States of America, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Chair-Back Adjustments, of which the following is a s ecification.

My invention re ates to adjustable backs for use on typewriter chairs, music stools and the like.

The objects of my invention are to rovide a comfortable and substantial back or such furniture, which can be readily adjusted to suit the convenience or fancy of the user, and one which is simple in construction and cheap .to produce.

The principles of my invention are illus- I trated in the drawings, in which Figurel shows a side view of a bookkeepers or ty ewriters chair having my im roved ad ustable back attached thereto. ig. 2 is a rear View of a clamp for vertical adjustment taken on the line 22 of Fig. 3 Fig. 3 is a bottom view of the horizontal slide and guides thereforFig. 4 is a section of Fig. 3 on the line 44..

Further describing my invention by reference to the drawings, in which like characters of reference denote like parts throughout: Fig. 1 shows a stool, having the legs 5, leg connections 6, foot rest 7, and seat 8. The latter should preferably be made of a solid piece of wood flat on the underside, to which is attached the device for horizontal adjustment of the back. This is referably made of angle iron. One of the egs of the slide is mitered as shown at 11 to form a flange 12 lying parallel with the under side of the seat. The joints may be brazed at the miter and the whole further strengthened by the tie bar 13, which connects the downturned legs which form flanges 14 standing at right angles to the bottom of the chair seat. Guides 15 adapted to engage the horizontal flanges of the slide may be offset from a single piece of metal having the body 16 which is attached by screws 17 to the bottom of the chair seat. When the several parts are put in the relation to each other shown in the drawings, the slide 10 will move freely backward and forward in the guides 15, but can be controlled in such movements and be securable at any desired point by the thumb screw 18. The dependent flange forming the rear portion 20 of the slide provides the stationary portion of a clamp of which the movable portion or jaw 21 is the other. This should be formed of a piece of flat iron having a series of transverse flutings 22 which correspond to the vertical wires 25 which support the back rest 26. The clamp 21 may be held in place by the adjusting screw 32. Sidewise displacement of the back wires and the clamping means therefor may be prevented b the pins or guides 27 which pass throug the movable and stationary members of the clamp thus described. The combination of curved and flat surfaces described and which thus embrace the vertical wires of the back bearing upon each other in the manner described, give a high degree of friction and secure attachment against displacement in use.

I claim and desire to secure by Letters Patent the following:

1. In combination with a chair seat and back comprising rods or Wires a slide having a vertical plane flange and horizontal flanges, a clamp comprising a grooved free member to secure the back wires to the vertical flange, guides independent of the clamp securing means to secure said clamp in proper relation to the vertical flange, and guideways on the seat to engage the horizontal flanges.

2. In a chair back adjustment a slide independent of the seat comprising vertical and horizontal flanges and a tie bar to connect the front ends of the vertical flanges.

3. In a chair back adjustment, a slide comprising vertical flanges, horizontal flanges mitered together substantially at the rear portion, and a tie bar to connect the front ends of the slide.

4. In a chair back adjustment, a slide having vertical flanges, horizontal flanges mitered together at the rear portion, a clamp for the back wires comprising a free member, and means for adjustably securing the same to the rear portion of the slide.

5. In a chair back adjustment, a slide having vertical flanges, horizontal flanges mitered together at the rear portion, a clamp for the back Wires comprising a transversely fluted free member, and means for adjustably securing the same to the rear portion of the slide. l

6. In a chair back adjustment, a slide formed of angle iron, one leg of such iron being mitered to form horizontal flanges, and the other leg being bent to form continuous flanges.

7. In a chair back adjustment, a slide formed of angle iron, one leg of such iron be ing mitered to form horizontal flanges, and the other leg being bent to form continuous depending flanges, and a tie bar to connect the ends of said slide.

8. In a chair back adj ustrnent, the combination with a slide formed of angle iron, one leg of such iron being mitered to form horizontal flanges and the other leg being bent to form a continuous depending flange; of a back clamping jaw, and means for adjustably attaching flange. V V

9. In a chair back adjustment, the combination with a slide formed of angle iron, one leg of such iron being mitered to form hori zontal flanges and the other leg being bent to form a continuous depending flange; of a the same to the depending j transversely fluted back clamping jaw, and means for adjustably attaching the same to the de ending flange.

10. n a chair back adjustment, a slide formed of angle iron, one leg of said iron being shaped to form horizontal flanges, and the other leg thereof being bent so that the central portion is adapted to act as one member of a back clamping devicewhile the end portions provide vertical stiflening flanges.

In witness whereof, I have hereunto subscribed my name this 3rd day of August A. D. 1905-, in the presence of two subscribing witnesses.

JOSEPH SALOMON.

Witnesses:

C. K. OrLAMBERLAiN, A. S. PHILLIPS. 

